Energy Boost: 8 – Well, here is the major difference between the red and yellow bottle, the yellow bottle provides no better energy boost that a handful of other energy drinks that taste light-years better than this crap. At least with the red bottle I can disregard the awful taste due to the fact that the **** is like rocket fuel once it his my stomach; the yellow bottle...meh. You definitely feel a boost but its not worth the $2.50 and awful taste. If you want to get jacked up stick with the red bottle.